Commutator-brush.



PTENTED JUNE ll, 1%?.

WLMUTTR BRUSH APELIGATIGN FILED JAN.3,1905.

S LL S S E N W W vIO ' STATES PATENT FFE. ROBERT siEeRRiitD, oFPITTSBURG, PENN-sYLvANiA, AssieNoR To vvnsr-INGHOUSE,ELECTRIC-AMANURAOTURING COMPANY, A CORPORATION orrENNsYLvANIA.1

'coMmuTATon-Bnusl-i.

` Appnmion mammary 3,1905. sal-19.1 No. zeste?.

Ta'otZZ whom it may concern:

Be it known that I, ROBERT SIEGFRIE1 a citizen of the 'United States,and a' resident of Pittsburg,in the county of 'Allegheny and and Stateoflennsylvania, have invented a new and useful Improvementin'Cornrnutator-Brushes, ofvwhich the .following is a speci-lv fication.l

M ylnvention relates to carbon .commutator brushes for electricalmachines, and its obj ect is to provide improved rneansvfor connectingvflexible metal conductors to such brushes.

panying drawing, in which ance with my invention. Figs. 2, 3 and 4arekviews, in perspective, respectively of a .hole 1n its outer end anda dou le-Web, Woven pin,'a shunt conductor and 'a brush which illustratethe structural 'details of my invention, a portion of the brush of Fig.4 being broken away for. the sake of clearness of illustration, Fig. 5is an enlarged, detail 2 5- in FigzS. yA hole 1 is bored into one' endof a brush 2, the upper portion of the hole being countersunk, asshownat 3, and notched, as shown at 4. Conducting shunt 5 comprises a doubleweb thatis woven from wires or strands and a clip 6 which is soldered orotherwise secured to the free end of the shunt, by means of whichconnection may be made to other conducting portions of a br'ush holder,(not shown); The other end 7 of the conducting` shunt 5 is distended totubular form and is bent approximately at right-angles to the main,attened portion and inserted into the hole l in the` brush 2. Thestrands on the one side of the tribular portion of the shunt 5 arespread at 8 -and a pin 9 is inserted and forced into the distended end7, thereby causing good 'electrical contact between the i the pressureexerted by the pin 9. The head sures a good electricalconnectionbetween' My invention is illustratedin the acconc-v Figure 1is a perspective view of a brush* with its shunt oonnectlon made 1naccord view of one endlof the shunt conductor shownv j point ofinsertion.

brush l and the conducting shunt, owing to- The construction shown anddescribed inl lthe -shunt conductor and the top of the carn bon brushand one thatis readily and inoxpensively made meuch manner as toeconornize space and insure a desired relation .of

the parts.

\ I claim as Iny invention:

l. The combination with a vbrush oir-ter` minalwhichris provided with 'ahole,of a double-web conducting cable havingcne end inserted into saidhole and 'a pi'nwhich pierces one side of the cable and is forced intosaid. hole so as to distend the end of thecable.

2. The combination with a brush which is provided with a'hole, ofrailattened, doubleweb conducting cable having one end inserted into saidhole, and a pin which pierces one sideeof the cable and forces the,cable into close contact with the walls oi' the hole.

3. vA carbon Ubrush havin@r a cylindrical conductor, one end of whichprojects into said hole at an angle to its body portion,and a pin thatprojectsinto the bent end'of the woven conductor to clani'p itinposition. A

4. A carbon brush having a cylindrical hole in its outer end and adouble-web,woven conductor, one 'endof which is inserted in said hole,and a pin that is driven into the hole through one side ofthe web andthrough the interior of the portion that is beyond the y5. A carbonbrush havin outer end and a double-we iiexible' con` ductor, one end ofwhich projects into said hole at an angle to its body portion, and a pinthat projects through one side of the Web Patented Jua@ 11, ieo'` a holein its f adjacent to the end of the brush and distende o the web withinthe hole. o

6. A contact lneinber having a cavity formed therein, a double-web,iiexible conductor, one end of which is inserted into Said cavity and awedge that projects throu h one side of the flexible conductor into tcavity and forces the conductor into close contact with the wallsthereof.

In'testiniony whereof, l have hereunto subscribed my naine this 30th dayof December, i904.

' ROBERT SIEGFRIED.

Witnesses: v

OTTO S. SOHAIRRR, BIRNEY HINEs.

